u/externallygreen

I'm making my first short film soon, and I have everything prepared except for a mic. My budget is small, so I don't entirely know which corners to cut. Should I have my mic attached to my camera, or should I invest in a boom setup? I'm also planning on having one far shot, where I'm okay with the dialogue sounding far away, but would I need to still have a mic close to the actors to achieve this and to maintain clear audio? Is there anything else important I'd need to know when making sure my audio is good?